• Brownian Motion@lemmy.world
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    1 year ago

    Depending on the coils number of windings, and the size of the tool it will magnetise it pretty well. I used to do this to screwdrivers before they came pre-magnetised. And they will stay magnetised for a very long time.

    Most of the time the reason for becoming demagnetised is due to dropping the tool several (many) times.